I can't imagine how much fun this would be - couple of mates, few beers, one sunny afternoon and this.
haha, its just one of those things, you'd crap yourself but after 2/3 goes you'd become addicted and just wanna go higher and faster!
Was going to set up a bridge swing as I have all the equipment, but not got round to it. Done smaller ones at work (well, wide pendulums on a more rigid rope) and you're right the tickle in your belly is brilliant - like a kid on a rollercoaster for the first time.Here's an industrial version from a job I was on in 2005...